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Polaroid 3732 had blue light no picture now no power after cap replacement

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    #1

    Polaroid 3732 had blue light no picture now no power after cap replacement

    Hey everyone

    I had the issue where I got blue light and no picture and/or high pitched sounds. I opened it up and saw 2 bad caps.

    Replaced them and now the TV won't turn on at all i.e. no blue light. Seems like it's dead. It's my gf tv and I don't visit often so I can't remember what state it was in before I did work to it i.e. if my soldering messed it up. I will note that some of the dark green circuit board came off the wood, only a small area maybe .5cm but it seems to be down ok and soldered in ok. Is there anyway to try and salvage this shite TV?

    Also I may mention I don't have that plastic sheath on the back. No idea why that would stop it from working.

    thanks for any help
    Last edited by brisk; 04-08-2013, 04:33 PM.
    Tags: None
    #2
    Re: Polaroid 3732 had blue light no picture now no power after cap replacement

    dark green circuit board came off the wood, only a small area maybe .5cm
    ... yeah, that's your problem. The board is fiberglass composite, by the way, not wood. The copper layer on top of it must be connected to the capacitor terminal. There's no point in soldering it, if nothing is connecting to the lead! As far as the standby light, every Polaroid I have seen has it glowing in standby, off in operation.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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      #3
      Re: Polaroid 3732 had blue light no picture now no power after cap replacement

      Originally posted by tom66 View Post
      ... yeah, that's your problem. The board is fiberglass composite, by the way, not wood. The copper layer on top of it must be connected to the capacitor terminal. There's no point in soldering it, if nothing is connecting to the lead! As far as the standby light, every Polaroid I have seen has it glowing in standby, off in operation.
      Thanks for your quick reply.

      Well i pushed it down and then just put a lot of solder on. Maybe some pics can help show what I"ve done wrong etc:

      http://s10.postimg.org/vygi32mdl/IMG...408_174624.jpg

      http://s24.postimg.org/istlh9nk5/IMG...408_175234.jpg

      http://s2.postimg.org/vfglplnax/IMG_20130408_175241.jpg

      Comment

        #4
        Re: Polaroid 3732 had blue light no picture now no power after cap replacement

        Cut off the legs. You may have shorted out the entire board by leaving those legs.

        Recapping FAQ.

        https://www.badcaps.net/forum/showthread.php?t=485
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        Comment

          #5
          Re: Polaroid 3732 had blue light no picture now no power after cap replacement

          Originally posted by retiredcaps View Post
          Cut off the legs. You may have shorted out the entire board by leaving those legs.

          Recapping FAQ.

          https://www.badcaps.net/forum/showthread.php?t=485
          HOLY MOTHER OF SWEET JESUS

          I just clipped those legs and pushed down the little bit of detached fibre glass a bit as it was up by 1mm or 2 and everything seems to be working!! Getting red light n blue light and it turns on to generic blue input screen. Will have to actually use it and come back here if I get more issues.

          Wow you guys rule.

          Comment

            #6
            Re: Polaroid 3732 had blue light no picture now no power after cap replacement

            Originally posted by brisk View Post
            HOLY MOTHER OF SWEET JESUS

            I just clipped those legs and pushed down the little bit of detached fibre glass a bit as it was up by 1mm or 2 and everything seems to be working!! Getting red light n blue light and it turns on to generic blue input screen. Will have to actually use it and come back here if I get more issues.

            Wow you guys rule.
            Amen.

            sounds like the track was broken? Did you repair it by exposing some copper and soldering over the break?

            Comment

              #7
              Re: Polaroid 3732 had blue light no picture now no power after cap replacement

              Originally posted by tw2005 View Post
              Amen.

              sounds like the track was broken? Did you repair it by exposing some copper and soldering over the break?
              My thinking to begin with was to push the green stuff down then solder liberally so try and 'glue'/hold it down. I still saw when opening it up again (for the 8th time) that it was up ever so slightly so i just pushed it down with my finger and it seemed to stay down. I remember from my first days of soldering not to let the soldering where the components of legs go through board to cross with the other tracks? Not sure if that's true.

              As you can tell I don't specialise in electronics, I work in IT though and did soldering at my secondary school 7+ years ago ha. Seems like school was relevant for something.

              Comment

                #8
                Re: Polaroid 3732 had blue light no picture now no power after cap replacement

                I was not sure if it was the trimming or pushing that fixed it for you. I like the humour, got a chuckle from post#5 and the pics. Nice recovery

                Comment

                  #9
                  Re: Polaroid 3732 had blue light no picture now no power after cap replacement

                  fibreglass pen to scratch away the top green layer to expose copper and then a wire bridge to fix the track is the best way to go rather than just heating up a already broken track

                  Comment

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